How do I add color to old Black and White Photos?

I've been searching for ages after signing up to Photoshop, but none of the video links that should demonstrate hot to use it work, and I wanted to know if I can add colour to old B & W photos, but gave up in the end??

The editing tools in the Free Photoshop Express editor on Photoshop.com aren't sophisticated enough for colorizing old black and white photos. There are commands tools for making color images black and white, or making one color pop out from a color image.

Photoshop Elements and Photoshop CS5 are capable of colorizing Black and White photos.

The editing tools in the Free Photoshop Express editor on Photoshop.com aren't sophisticated enough for colorizing old black and white photos. There are commands tools for making color images black and white, or making one color pop out from a color image.

Photoshop Elements and Photoshop CS5 are capable of colorizing Black and White photos.